@book { DatenbankzugriffeberdasInternet,
    title = "Datenbankzugriffe über das Internet",
    author = "Ludwig {Mittermeier}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832443405",
    url = "https://m.diplom.de/document/219952"
}